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demandimport: fix a crash in LazyFinder.__delattr__...
demandimport: fix a crash in LazyFinder.__delattr__ I was tinkering with `with hgdemandimport.deactivated()` wrapped around loading the keyring module, and got spew that seemed to be confirmed by PyCharm. But I can't believe we haven't seen this before (and phabricator uses the same pattern): ** Unknown exception encountered with possibly-broken third-party extension "mercurial_keyring" 1.4.3 (keyring 23.11.0, backend unknown) ** which supports versions unknown of Mercurial. ** Please disable "mercurial_keyring" and try your action again. ** If that fixes the bug please report it to https://foss.heptapod.net/mercurial/mercurial_keyring/issues ** Python 3.9.15 (main, Oct 13 2022, 04:28:25) [GCC 7.5.0] ** Mercurial Distributed SCM (version 6.3.1) ** Extensions loaded: absorb, attorc 20220315, blackbox, eol, extdiff, fastannotate, lfs, mercurial_keyring 1.4.3 (keyring 23.11.0, backend unknown), phabblocker 20220315, phabricator 20220315, purge, rebase, schemes, share, show, strip, uncommit Traceback (most recent call last): File "/usr/local/bin/hg", line 59, in <module> dispatch.run() File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 143, in run status = dispatch(req) File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 232, in dispatch status = _rundispatch(req) File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 276, in _rundispatch ret = _runcatch(req) or 0 File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 451, in _runcatch return _callcatch(ui, _runcatchfunc) File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 461, in _callcatch return scmutil.callcatch(ui, func) File "/usr/local/lib/python3.9/site-packages/mercurial/scmutil.py", line 153, in callcatch return func() File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 441, in _runcatchfunc return _dispatch(req) File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 1265, in _dispatch return runcommand( File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 899, in runcommand ret = _runcommand(ui, options, cmd, d) File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 1277, in _runcommand return cmdfunc() File "/usr/local/lib/python3.9/site-packages/mercurial/dispatch.py", line 1263, in <lambda> d = lambda: util.checksignature(func)(ui, *args, **strcmdopt) File "/usr/local/lib/python3.9/site-packages/mercurial/util.py", line 1880, in check return func(*args, **kwargs) File "/root/mercurial_keyring/mercurial_keyring/mercurial_keyring.py", line 962, in cmd_keyring_check user, pwd, source, final_url = handler.get_credentials( File "/root/mercurial_keyring/mercurial_keyring/mercurial_keyring.py", line 497, in get_credentials keyring_pwd = password_store.get_http_password(keyring_url, actual_user) File "/root/mercurial_keyring/mercurial_keyring/mercurial_keyring.py", line 287, in get_http_password return self._read_password_from_keyring( File "/root/mercurial_keyring/mercurial_keyring/mercurial_keyring.py", line 335, in _read_password_from_keyring keyring = import_keyring() >> `with hgdemandimport.deactivated()` inserted here File "/root/mercurial_keyring/mercurial_keyring/mercurial_keyring.py", line 120, in import_keyring return _import_keyring() File "/root/mercurial_keyring/mercurial_keyring/mercurial_keyring.py", line 133, in _import_keyring mod, was_imported_now = meu.direct_import_ext( File "/usr/lib/python3.9/site-packages/mercurial_extension_utils.py", line 1381, in direct_import_ext __import__(module_name) File "<frozen importlib._bootstrap>", line 1007, in _find_and_load File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 680, in _load_unlocked File "/usr/local/lib/python3.9/site-packages/hgdemandimport/demandimportpy3.py", line 46, in exec_module self.loader.exec_module(module) File "/usr/lib/python3.9/site-packages/keyring/__init__.py", line 1, in <module> from .core import ( File "<frozen importlib._bootstrap>", line 1007, in _find_and_load File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 680, in _load_unlocked File "/usr/local/lib/python3.9/site-packages/hgdemandimport/demandimportpy3.py", line 46, in exec_module self.loader.exec_module(module) File "/usr/lib/python3.9/site-packages/keyring/core.py", line 11, in <module> from . import backend, credentials File "<frozen importlib._bootstrap>", line 1007, in _find_and_load File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 680, in _load_unlocked File "/usr/local/lib/python3.9/site-packages/hgdemandimport/demandimportpy3.py", line 46, in exec_module self.loader.exec_module(module) File "/usr/lib/python3.9/site-packages/keyring/backend.py", line 13, in <module> from .py312compat import metadata File "<frozen importlib._bootstrap>", line 1007, in _find_and_load File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 680, in _load_unlocked File "/usr/local/lib/python3.9/site-packages/hgdemandimport/demandimportpy3.py", line 46, in exec_module self.loader.exec_module(module) File "/usr/lib/python3.9/site-packages/keyring/py312compat.py", line 10, in <module> import importlib_metadata as metadata # type: ignore File "<frozen importlib._bootstrap>", line 1007, in _find_and_load File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 680, in _load_unlocked File "/usr/local/lib/python3.9/site-packages/hgdemandimport/demandimportpy3.py", line 46, in exec_module self.loader.exec_module(module) File "/usr/lib/python3.9/site-packages/importlib_metadata/__init__.py", line 715, in <module> class MetadataPathFinder(NullFinder, DistributionFinder): File "/usr/lib/python3.9/site-packages/importlib_metadata/_compat.py", line 24, in install disable_stdlib_finder() File "/usr/lib/python3.9/site-packages/importlib_metadata/_compat.py", line 43, in disable_stdlib_finder del finder.find_distributions File "/usr/local/lib/python3.9/site-packages/hgdemandimport/demandimportpy3.py", line 88, in __delattr__ return delattr(object.__getattribute__(self, "_finder")) TypeError: delattr expected 2 arguments, got 1
Matt Harbison -
r50669:48e38b17 stable
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Oxidized Mercurial

This project provides a Rust implementation of the Mercurial (hg)
version control tool.

Under the hood, the project uses
PyOxidizer to embed a Python
interpreter in a binary built with Rust. At run-time, the Rust fn main()
is called and Rust code handles initial process startup. An in-process
Python interpreter is started (if needed) to provide additional
functionality.

Building

First, acquire and build a copy of PyOxidizer; you probably want to do this in
some directory outside of your clone of Mercurial:

$ git clone https://github.com/indygreg/PyOxidizer.git
$ cd PyOxidizer
$ cargo build --release

Then build this Rust project using the built pyoxidizer executable:

$ /path/to/pyoxidizer/target/release/pyoxidizer build --release

If all goes according to plan, there should be an assembled application
under build/<arch>/release/app/ with an hg executable:

$ build/x86_64-unknown-linux-gnu/release/app/hg version
Mercurial Distributed SCM (version 5.3.1+433-f99cd77d53dc+20200331)
(see https://mercurial-scm.org for more information)

Copyright (C) 2005-2020 Olivia Mackall and others
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Running Tests

To run tests with a built hg executable, you can use the --with-hg
argument to run-tests.py. But there's a wrinkle: many tests run custom
Python scripts that need to import modules provided by Mercurial. Since
these modules are embedded in the produced hg executable, a regular
Python interpreter can't access them! To work around this, set PYTHONPATH
to the Mercurial source directory. e.g.:

$ cd /path/to/hg/src/tests
$ PYTHONPATH=`pwd`/.. python3.9 run-tests.py \
    --with-hg `pwd`/../rust/hgcli/build/x86_64-unknown-linux-gnu/release/app/hg